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/*
* Copyright 2002-2004 Apache Software Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package org.apache.tools.ant.types.optional.image;
import org.apache.tools.ant.types.EnumeratedAttribute;
import javax.media.jai.JAI;
import javax.media.jai.PlanarImage;
import java.awt.image.BufferedImage;
import java.awt.image.renderable.ParameterBlock;
/**
*
* @author <a href="mailto:kzgrey@ntplx.net">Kevin Z Grey</a>
* @author <a href="mailto:roxspring@imapmail.org">Rob Oxspring</a>
* @see org.apache.tools.ant.taskdefs.optional.image.Image
*/
public class Scale extends TransformOperation implements DrawOperation {
private String width_str = "100%";
private String height_str = "100%";
private boolean x_percent = true;
private boolean y_percent = true;
private String proportions = "ignore";
public static class ProportionsAttribute extends EnumeratedAttribute {
public String[] getValues() {
return new String[] {"ignore", "width", "height", "cover", "fit"};
}
}
/**
* Sets the behaviour regarding the image proportions.
*/
public void setProportions(ProportionsAttribute pa) {
proportions = pa.getValue();
}
/**
* Sets the width of the image, either as an integer or a %. Defaults to 100%.
*/
public void setWidth(String width) {
width_str = width;
}
/**
* Sets the height of the image, either as an integer or a %. Defaults to 100%.
*/
public void setHeight(String height) {
height_str = height;
}
public float getWidth() {
float width = 0.0F;
int perc_index = width_str.indexOf('%');
if (perc_index > 0) {
width = Float.parseFloat(width_str.substring(0, perc_index));
x_percent = true;
return width / 100;
} else {
x_percent = false;
return Float.parseFloat(width_str);
}
}
public float getHeight() {
int perc_index = height_str.indexOf('%');
if (perc_index > 0) {
float height = Float.parseFloat(height_str.substring(0, perc_index));
y_percent = true;
return height / 100;
} else {
y_percent = false;
return Float.parseFloat(height_str);
}
}
public PlanarImage performScale(PlanarImage image) {
ParameterBlock pb = new ParameterBlock();
pb.addSource(image);
float x_fl = getWidth();
float y_fl = getHeight();
if (!x_percent) {
x_fl = (x_fl / image.getWidth());
}
if (!y_percent) {
y_fl = (y_fl / image.getHeight());
}
if ("width".equals(proportions)) {
y_fl = x_fl;
} else if ("height".equals(proportions)) {
x_fl = y_fl;
} else if ("fit".equals(proportions)) {
x_fl = y_fl = Math.min(x_fl, y_fl);
} else if ("cover".equals(proportions)) {
x_fl = y_fl = Math.max(x_fl, y_fl);
}
pb.add(new Float(x_fl));
pb.add(new Float(y_fl));
log("\tScaling to " + (x_fl * 100) + "% x " + (y_fl * 100) + "%");
return JAI.create("scale", pb);
}
public PlanarImage executeTransformOperation(PlanarImage image) {
BufferedImage bi = null;
for (int i = 0; i < instructions.size(); i++) {
ImageOperation instr = ((ImageOperation) instructions.elementAt(i));
if (instr instanceof DrawOperation) {
return performScale(image);
} else if (instr instanceof TransformOperation) {
bi = image.getAsBufferedImage();
image = ((TransformOperation) instr).executeTransformOperation(PlanarImage.wrapRenderedImage(bi));
bi = image.getAsBufferedImage();
}
}
return performScale(image);
}
public PlanarImage executeDrawOperation() {
for (int i = 0; i < instructions.size(); i++) {
ImageOperation instr = ((ImageOperation) instructions.elementAt(i));
if (instr instanceof DrawOperation) {
PlanarImage image = null;
// If this TransformOperation has DrawOperation children
// then Rotate the first child and return.
performScale(image);
return image;
}
}
return null;
}
}
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